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Dear experts,

I have 5 attributes with 3 or 2 attribute levels. The total of 18 or 24 choice sets are both OK for my design. But I chose the 24 choice set. And I made the 24 choice set into blocks. I am wondering if I made something wrong. Should I make 18 choice set with 3 blocks? In the ngene ...

Dear Prof.Michiel Bliemer,

Thanks so much!


Best!

Dear Prof.Michiel Bliemer,

I am afraid you may not notice the question of my last post. So I start a new post.

Thank you so much for your reply! I have an opt-out in the pilot. Then how to estimate the constant? I used logit and conditional logit in stata to run the pilot model.

The logit model ...

Dear Prof.Michiel Bliemer,

Thank you so much for your reply! I have an opt-out in the pilot. Then how to estimate the constant? I used logit and conditional logit in stata to run the pilot model.

The logit model shows as belows:
coef.
attribute1 -0.0021
attribute2 0.2077
attrubute3 -0.415 ...

Dear Experts,

I am using a D-efficient design. After the pilot, I got all the priors. In each choice set, I have three alternatives, option 1, option 2, and opt-out. After I ran the formal design, I have two attributes that have negative priors, which are also in line with the theory. Then I found ...